Well, to me it looks like the hotel pulled their space for Thanksgiving week for some reason, so the USPPA rescheduled their prime events for the dates the Reno Open was to take place.
It could be a number of reasons. I was looking it over and the hotel has huge meeting space. It was probably an event conflict, or it could have been a contractual issue. Maybe the hotel demanded room guarantees during Thanksgiving week, and USPPA wasn't willing to do it.
The hotel agreements are complicated. It can get to be pretty nasty booking these kind of events.